A catalyst is a scheduled or expected event that can move price hard, like an exchange listing, a token unlock, a big partnership, or a protocol upgrade. Catalysts are dangerous precisely because everyone can see them coming. The move often happens before the event, not after, as traders position ahead of the news.
This is where the old saying buy the rumor, sell the news comes from. Price runs up on the anticipation, and then the moment the good news is confirmed, the traders who bought early sell into the excitement. A great headline can print right as price rolls over, because the people who wanted in are already in.
Not all catalysts point up. A token unlock releases a new batch of previously locked supply to the market, often to the team or early investors. More sellable supply with the same demand tends to push price down. A known unlock date is a scheduled wave of supply, and trading into it without respecting that is how people get quietly bled.
The safest way to trade a catalyst is to decide your plan before it hits, while you are calm. Either take a defined position ahead of it with a clear invalidation, or stand aside and let the event pass. The one move to avoid is jumping in during the chaos of the event itself, when spreads are wide, depth is thin, and price is whipping both ways.
Catalysts are priced in before they arrive, so the news often marks the end of the move, not the start. Plan your position before the event, and never chase the whipsaw during it.
Tip. Mark known unlock and listing dates on a calendar before you size a position. Walking into a supply unlock unaware is an avoidable loss, because the date was public the whole time.